import React from "react";
import { NavLink, Route, Routes, Navigate } from 'react-router-dom'
import About from "./pages/About";
import Home from "./pages/Home";
export default function App() {
  function computedClassName({isActive}) {
    return isActive ? "list-group-item atguigu" : "list-group-item"
  }
  return (
    <div>
      <div className="row">
        <div className="col-xs-offset-2 col-xs-8">
          <div className="page-header">
            <h2>React Router Demo</h2>
          </div>
        </div>
      </div>
      <div className="row">
        <div className="col-xs-2 col-xs-offset-2">
          <div className="list-group">
            {/* 路由链接 */}
            {/* 自定义样式需要className写成函数判断是否被激活 */}
            {/* <NavLink className={({isActive})=>isActive ? "list-group-item atguigu" : "list-group-item"} to="/about"> */}
            <NavLink className={computedClassName} to="/about">
              About
            </NavLink>
            <NavLink className={computedClassName} to="/home">
              Home
            </NavLink>
          </div>
        </div>
        <div className="col-xs-6">
          <div className="panel">
            <div className="panel-body">
                {/* 注册路由 */}
              <Routes>
                <Route path="/about" element={<About/>} />
                <Route path="/home" element={<Home/>} />
                {/* 重定向 */}
                <Route path="/" element={<Navigate to="/about" />} />
              </Routes>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}
